Funnel of submarine vessels.



HAROLD E. YARROW, F GLASGOW, SCOTLAND.

runner or SUBMARINE vEss LsQ messes Specification of Letters Patent.

Patented Mar. as, rare.

Application filed October so, 1917. Serial No. 199,308.

To all whom it may concern."

Be itknown that I, HAROLD now, a subject of the King of Great Britain,

residing in Glasgow, Scotland, have invent ed certain new and usefulImprovements Relating to Funnels of Submarine Vessels,

of which the following is a specification.

It has lately been found possible to reduce the size of the tunnels orvessels, more particularly of the submarine type driven by oil fuel, byincreasing the pressure of the air supply to the furnaces.

The small size of the funnel allows means to be employed for housing thefunnel when the vessel is submerged, which were not practicallyapplicable to the larger size of tunnel required formodern practice.

Accordmg to the present invention, the funnel is made telescoplc, andwhen the vessel is submerged, is lowered into a receptacle provided inthe steam drum.

In the accompanying drawing which represents a cross section through aboiler compartment of a submarine, A. is the shell of the. submarine, B13 external water ballast tanks-C a steam drum, D D water drums,

E E the tubes, F the'uptake, Gthe funnel, which can be lowered, as shownby the full lines in the figure, into a pocket l-l provided EDGAR YAR-in the steam drum, the aperture in the shell being closed by a valve 1.The funnel is shown in the raised position by dotted lines.

The housing of the funnel in the steam drum in the manner described alsoprovides a firm foundation for the base of the tunnel to rest upon whenit is in the housed position and has to be made water-tight.

I am aware that telescopic funnels have been proposed forthecomparatively small powered submarine vessels first constructed, and Ido not broadly claim the use of such funnels.

Having thus described the nature of the said invention and the bestmeans I know of carrying the same into practical efieet, I

A telescopic tunnel for a submarine ves sel adapted to be lowered whenthe vessel is submerged into a housing provlded in the steam drum.

In testimony whereof I have signed my name to this, specification in thepresence of two subscribing witnesses.

- HAROLD E. YARROlV.

Witnesses JAMES Rrrorrm, SILVESTER Lrr'ron.

Copies of this petent may he obtainekl for five cents each, byaddressing the Commissioner of Patents Washin ton, (1.

